Help! Smear in Real-Time PCR Product

I am trying to perform qPCR on cDNA samples from mice. I performed my cDNA synthesis with Superscript Vilo (Invitrogen), which is based on random priming. I have some samples in which I observe non-sigmoidal amplification plots, these samples have very low Ct counts (See attachment). And if I run these samples on an 1% agarose gel I observe smearing in addition to the PCR product of expected size (See attachment). For my qPCR I used 1:10 diluted cDNA with Quantitect SYBR Green Kit (Qiagen).

What are these smears on the gel, and how can I get rid of them?
Any ideas or suggestions or solutions will be greatly appreciated